Ultra violet ray lamp



May 29, 19345 M. PAR ISI ULTRA VIOLET RAY LAMP Filed Aug. 19, 1931 INVEN TOI Z. M pm Patented May 29, 1934 ULTRA VIOLET RAY LAMP MichaelParisi, New York, N. Y., assignor to Isidor Goldberg, New York, N. Y.

Application August 19, 1931, Serial No. 558,028

6 Claims.

tus utilizes the mercury vapor enclosed in a quartz bulb, said bulbbeing either filled with an inert gas, or only exhausted of air to thehighest degree. The principal object of this invention is to provide apractical and robustly constructed apparatus, capable of generating anylarge amount of such ultra violet rays and economically.

Another object of this invention is to simplify existing methods, andadd new features for the constancy and perfect working of the are that'I generates such rays. With these and other ob- 15 jects in view, whichwill be described fully in this description, and to render clearer theworking of my invention, I have attached the following drawing, inwhich:

Figure 1 shows a front elevation of my invention.

Figure 2 shows a bottom View of my invention.

Figure 3 shows a plan view of the mercury seal element of my invention.

Figure 4 is a front elevation partly in section showing a detail of themercury seal.

Figure 5 is a plan view of a support element applied in this invention.

Figure 6 is a front view of the structure shown in Fig. 5.

In Fig. 1 (1) is a quartz bulb, cylindrical in shape, and having adiameter approximately two inches, by five inches in length. In thisbulb are placed two electrodes (5-6) consisting of wires of an alloywhich does resist higher temperature, and is not subject to amalgamatewith mercury vapor. These electrodes forming integral part of two coils(4) each possessing a certain resistance and selfinductance. Said coilsare held together by two quartz slats (2-3) for the purpose ofmaintaining them straight, even when they are subjected to a hightemperature. The terminal wires of the apparatus going through a mercuryseal, will be connected to an Edison plug (11) At the bottom of bulb (1)there are two protuberances (7-8) wherein the electrodes (5-6) are incontact with metallic mercury. It is to be noted that the mercury pools(7-8) are separated one from another by an arched surface (9) so thatthere is no actual contact from the liquid of one pool with that of theother. Said pools have a diameter of approximately one-half inch, asindicated at the bottom view in Figure 2, the rest or" the bulb bottom(1) being flat. At the upper part of the bulb (1) there is diaphragm(10) made of quartz,

serving as support to a mercury seal for the terminals of the apparatus.'Numeral (18) indicates a cylindrical extension of bulb (1) wherein areplaced two small tubings welded upon diaphragm (10). Numeral (12)indicates one of the tubings. Each wire from the coils (4) goes througha tight orifice (16) and is broken off at (14). III-each tubing thereare mica discs (13-15) and mericury (14) forming the seal. Fig. 3 showsin plan and Figure 4 shows in'elevation more constructional details forsaid mercury seal. The wires go through the orifices and a part ofasbestos (9) is used for obstructing the inner side of the orifice. Onthe top of the asbestos is placed a mica disc (8) and some hard sealingwax (7). Then mercury is added (6) on the top of which are a few moremica discs ('5) and afterward more sealing wax (3)., Another plug.

quartz slats (2-3) Fig. 1, used to hold the wind: ings in an uprightposition. This is necessary as, these windings will become very hot, andwould fall apart, impairing the proper working-of the apparatus. Thefunction of these coils is for absorbing any voltage fluctuation in thesupply circuit so affecting the mercury are which requires constantvoltage for a steady running. Also these coils, being part of thecircuit of the apparatus, they will become incandescent, and their heatimparted to the vapor of the are, helping to retard vapor condensation,and adding to the brilliancy and strength of the ultra violet rays sogenerated. At the upper part of the bulb at (18) there is provided spacefor attaching any suitable form of reflector, for the purpose ofconcentrating downward the rays of the apparatus. It should beunderstood that this type of apparatus is intended to work from alighting socket, and on a circuit Figures 5 and 6 are a small detail ofthe two for direct current only. To start the apparatus it will benecessary to tip the bulb slightly on one side, momentarily, so thatpart of the mercury from one pool will make contact with that of theother pool, and establish an arc.

In so describing my invention, it should be una plurality of mercurypools, disposed in cavities at the base of said bulb, electrodes havingtheir ends extending into the mercury pools, stabilizer coils disposedwithin said bulb and connected to the other ends of said electrodes,insulating discs disposed at the opposite ends of said coils, adiaphragm sealing the coils and electrodes and mercury pools within saidbulb, mercury seals disposed in the head of said bulb, contact membersdisposed on the head of said bulb and havingconductors leading into thesaid mercury seals, and conductors forming the free end extremities ofsaid coils leading into said mercury seals.

2. An apparatus for generating ultra violet rays, comprising a bulb,cavities at the'base of said bulb in which are disposed mercury pools,electrodes in said bulb having ends projecting into the mercury pools,stabilizer coils disposed in said bulb and connected respectively tosaid electrodes, a diaphragm for sealing the electrodes, stabilizercoilsandmercury within the substantially air free portion of said bulb,and a mercury seal for each of said electrodes disposed in the head ofsaid bulb, contact terminals at the head of said bulb, conductorsleading from the stabilizer coils into the respective mercury seals andconductors leadingfrom said mercury seals to said contact terminals.

.3. An apparatus for generating ultra violet rays, comprising a bulb,cavities at the base of said bulb in which are disposed mercury pools,elec-- trodes ,in said bulb projecting into the mercury pools,stabilizer coils disposed in said bulb and connected respectively tosaid electrodes, a diaphr-agmior sealing the electrodes, stabilizercoils and .mercury within the substantially air free portion of saidbulb, and a mercury seal for each :of :said electrodes disposed in thehead of said bulb, contact terminals at the head of said bulb,conductors leading from the stabilizer coils into therespectivemercuryseals and conductors leadzmg tromssaid mercury seals to said contactterminalssaid mercury sealscomprising heat resistant/hollow :pillarssealed at their respective ends and having pools of mercury disposedcentrally therein.

4.1m an apparatus for generating ultra violet rays, in combination witha bulb having cavities at the base thereof, mercury pools in saidcavities, electrodes having their free ends disposed in the mercurypools, spaced coil windings formed integrally with said electrodes, saidwindings being adapted, upon establishment of an are within said bulb,to stabilize the voltage in said tube and upon incanclescence to developheat effects sufficient to retard the condensation of the mercuryvolatiliz'ing within said bulb.

5. In an apparatus for generating ultra violet rays, in combination witha bulb having cavities at the base thereof, mercury pools carried insaid cavities, electrodes having their free ends disposed in the mercurypools, spaced coil windings formed integrally with said electrodes, saidwindings being adapted upon establishment of an are within said bulb tostabilize the voltage in said tube and'upon incandescence to developheat effects sufficient to retard the condensation of the mercuryvolatilizing within said bulb, a diaphragm separating the head from thebody of said bulb, and mercury seals disposed in the head of said bulb,conductors leading from said stabilizer coils into said mercury seals,and conductors leading from said mercury seals to terminals on saidhead.

6. In an apparatus for generating ultra violet rays in combination witha bulb having cavities at the base thereof, mercury pools carried insaid cavities, electrodes having their free ends disposed in the mercurypools, coil windings formed integrally with said electrodes andsupported in spaced relationship in said bulb, said windings beingadapted upon establishment of an arc within said'bulb to stabilize thevoltage in said tube and upon incandescence to develop heat effectssufficient to retard the condensation of the mercury *volatilizingwithin said bulb, a diaphragm separating the head from the body of saidbulb, and mercury seals disposed in the head of said bulb, conductorsleading from said stabilizer coils into said mercury seals, andconductors leading from said mercury seals to terminals on said head,said mercury seals comprising hollow tubular heat resisting elementssealed at their respective ends and'carrying a pool of mercury therein,the said 120,: conductors leading into and out of said mercury sealshaving their end extremities spaced within said mercury pool.

MICHAEL PARISI.

